The document describes the ADC0809, an 8-bit successive approximation ADC with an 8-channel multiplexer, suitable for interfacing with the 8086 microprocessor. It also details the DAC0800, an 8-bit high-speed current output DAC, which requires dual supply voltages and interfaces with various logic families. The document emphasizes conversion processes from digital to analog signals and outlines important specifications and configurations for both ADC and DAC components.

1. ADC 0809

2. ADC 0809
• The ADC0809 is an 8-bit successive approximation type
ADC with inbuilt 8-channel multiplexer.
• The ADC0809 is suitable for interface with 8086
microprocessor.
• The ADC0809 is available as a 28 pin IC in DIP (Dual Inline
Package).
• The ADC0809 has a total unadjusted error of ±1 LSD (Least
Significant Digit).

3. PIN DESCRIPTION OF
ADC0809

5. SAR

6. Interfacing ADC with 8085 thro 8255

7. ADC interfacing with 8051

8. DAC
• To convert the digital signal to analog signal a Digital-to-Analog Converter
(DAC) has to be employed. ( binary weighted and R/2R ladder. )
• The DAC will accept a digital (binary) input and convert to analog
voltage or current.
• Every DAC will have "n" input lines and an analog output.
• The DAC require a reference analog voltage (Vref) or current (Iref)
source.
• The smallest possible analog value that can be represented by the n-bit
binary code is called resolution.
• The resolution of DAC with n-bit binary input is 1/2nof reference
analog value.

9. DAC 0800
•
The DAC0800 is an 8-bit, high speed, current output DAC with a
typical settling time (conversion time) of 100 ns.
• It produces complementary current output, which can be converted to
voltage by using simple resistor load.
• The DAC0800 require a positive and a negative supply voltage in the
range
of ± 5V to ±18V.
• It can be directly interfaced with TTL, CMOS, PMOS and other
logic families.
• For TTL input, the threshold pin should be tied to ground (VLC =
0V).

10. R-2R Ladder

11. pin configuration of DAC0800

12. DAC interfacing with 8085 thro 8255

13. DAC interfacing with 8051